Re: [CAD_CAM_EDM_DRO] questions on cheap DRO

If you are looking to do a edm i suggest Hymark digital tape scale and the
resolution can be good enough for anything that you want to do and doesn't
care about dirt and any other type of contamination. The scale also puts
out differential outputs so you have a better noise free feedback. Let me
know the sizes that you need and I will get you a great price. Just
remember glass scales unless you pay more money are only good to about +/-
.0005 resolution.

Harko

On 3/23/06, digitalzeitgeist <digitalzeitgeist@...> wrote:
>
> I'm upgrading from the mill on my HF44142 3-in-1 to a new mill/drill
> from industrial hobbies (30x/12y/5z travel), and want to put DRO on
> the new mill and maybe also later on the lathe part of the HF44142.
>
> I like the documentation/feature set for the Shumatech DRO-350, but am
> not sure I'll need that much power, as I draw nearly everything I
> machine out in CAD, and can fairly easily have it print absolute
> coordinates around whatever point(s) of interest I choose.
>
> The 3-axis display that SMW sells on eBay looks fairly primitive
> (toggle/inch metric, zero each axis), but I'm wondering if it wouldn't
> be enough and if not, couldn't I always just upgrade the display part
> of it later to a DRO-350 (and maybe keep that somewhat limited SMW
> display for the lathe which I use less often/precisely than the mill).
>
> Pricing difference between SMW chinese scale kit and DRO-350 with
> chinese scales (also from SMW) currently looks something like:
>
> SMW on eBay Shumatech
> Display & Cables 430 225
> 32" X Scale incl 192
> 12" Y Scale incl 44
> 5-6" Z Scale incl 40
> Shipping 8 8
> Total 438 509
>
> A few questions:
>
> 1. Can anyone comment on the question of functionality? I can see
> how the additional functionality of the DRO-350s firmware would be
> useful if you didn't have dimensioned CAD drawings available, but is
> it worth an additional $70 and the hassle of assembling the DRO-350
> from parts if you have proper drawings?
>
> 2. Does anyone know if the cables that SMW provides in their ebay kit
> are plug and play compatible with the connectors used on the DRO-350
> or if I upgrade later, would I have to buy/build new cables?
>
> 3. Also, is there someone that sells just the glass scales? I don't
> need the extra precision for anything I'm doing now, but have been
> reading alot about homebrew EDM stuff which at somepoint I might like
> to fool around with. If it only cost $100 or so more to upgrade to
> glass scales with the DRO-350, I'd have to seriously consider it just
> so I'd have them.
>
> 4. Are there any other cheap DRO solutions I don't know about that
> work well?
>
> Thoughts, opinions???
>
>
>
>
>
>
>
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